[asterisk-biz] Need international DID's with unlimited (or very high) concurrent call limits

I'm looking for international DID providers that can handle high concurrent call limitations without charging per channel, or per concurrent call.  Any ideas?  We have US lines that see concurrent call volumes around 200 to 300 at times.  It is cost prohibitive for us to expand internationally if we have to pay per concurrent call.  All of the companies I am finding online provide 2 channels, and charge per channel for additional.

 

Any help would be greatly appreciated.

 

Sarah